웹 카메라를 이용한 시설 내 국화생산 광 환경 원격 모니터링

정선옥(Sun-Ok Chung),김용주(Yong-Joo Kim),이규호(Kyu-Ho Lee),성남석(Nam-Seok Sung),이철휘(Cheol-Hwi Lee),노현권(Hyun-Kwon Noh) 충남대학교 농업과학연구소 2015 농업과학연구 Vol.42 No.4

Increase of national family income improved demand of high-quality and year-round horticultural products including chrysanthemum. To meet these demand, farmers have introduced protected facilities, such as greenhouses, of which environmental conditions could be monitored and controlled. Environment management up to three weeks after transplanting is critical for chrysanthemum quality. Artificial lighting and light-blocking screen are especially important for long-day (day period > 13 hours) and short-day (night period > 13 hours) treatments. In this study, a web-camera was installed, and the image was obtained and transmitted to mobile phones to monitor the status of 3-wavelength(RGB) lighting environments. RGB pixel values were used to determine malfunctioning of the lighting lamps, and leaking out and incoming illumination status during short-day and long-day treatment periods. Normal lighting lamps provided RGB pixel values of 240~255. During long-day treatment period, G pixel values were useful to detect abnormal lighting conditions (e.g., leaking). During short-day treatment period, R pixel values were useful to determine incoming light (e.g., sun-light). Results of this study would provide useful information for remote monitoring of light conditions for protected chrysanthemum production under artificial lights.

자바가상머신을 위한 클래스 로더 시스템 설계 및 구현

유용선(YONG SUN RYU),류현수(HYUN SOO RYU),김용희(YONG HEE KIM),이철훈(CHEOL-HOON LEE) 한국정보과학회 2004 한국정보과학회 학술발표논문집 Vol.31 No.1A

최근 무선인터넷이 발달함에 따라, 핸드폰이나 PDA 및 정보가전용 기기들에 플랫폼 독립성, 이식성, 네트워크 이동성의 장점을 갖는 자바기술을 적용한 서비스가 증가하고 있다. 자바 플랫폼은 각각의 하드웨어 플랫폼에 맞게 포팅된 가상머신이 존재하여, 컴파일된 바이트 코드를 해석하기 때문에 플랫폼 독립성을 갖게 된다. 그러나 sun사의 JVM을 사용할 경우 고가의 royalty를 지불해야 하기 때문에 경쟁력을 높이기 위해 “클린눔(Clean Room)"에서 개발한 국산 KVM이 절실하며, 이에 국내에서 활발한 연구가 이루어지고 있는 실정이다. 본 논문에서는 자바가상머신의 일부분인 클래스 로더 시스템에 관해 설계 및 구현한다.

[P8-38] Effect of High Temperature and Pressure Treatment on the Antioxidant Activity of Extracts from Rice Hulls

Sun一Min Park,Seung-Cheol Lee 한국식품영양과학회 2007 한국식품영양과학회 학술대회발표집 Vol.2007 No.10

몇가지 植物의 棲息地 造成에 關한 硏究

윤종선,김익환,신세균,심우경,이철희,신영철 韓國植物ㆍ人間ㆍ環境學會 1999 인간식물환경학회지 Vol.2 No.2

종의 棲息密度가 낮아지고 있는 하늘나리, 섬초롱, 자란 3종의 식물을 인위적으로 棲息地를 造成하기 위하여 국립공원 속리산 등산로변 標高 200m, 400m, 600m 지점에 150주식 종당 450주를 조직배양 및 분주에 의하여 육묘 된 묘를 이식하여 생존상태 및 棲息地 造成의 가능성을 2년에 걸쳐 검토한 결과는 다음과 같다. 1. 造成 棲息地의 토양의 理化學的 造成은 pH 5.2∼5.6, 유기물 함량 29∼54g/㎏, CEC 9.4∼11.5㎝ mol(+)/㎏으로 산성을 띠고 있었으며, 유기물 함량은 높은 편이었고, 염기치환용량은 낮았으나 비교적 우리나라 典型的 山地土壤의 理化學的 造成과 유사하였다. 2. 棲息地內 생장기간의 投光率은 標高 200m 지역은 10.8∼11.6%, 400m lw역은 10.8∼11.4%, 600m 지역은 11.0∼12.8%로 식재식물의 生長環境에 부족한 상태였다. 3. 식재 식물 수는 식재 후 활착율은 3종 모두 양호하였으나, 점차 감소되었으며, 특히 자란의 감소율이 높았다. 감소의 원인을 분석한 결과 하늘나리, 섬초롱, 자란 모두 굴취나 절취의 피해가 많았으며, 특히 자란은 凍害에 의한 枯死가 1년차 72∼86주, 2년 차에서 19∼35주로 조사도어 자연상태에서의 越冬은 어려운 것으로 나타났으며, 집중호우에 의한 流失도 감소의 한 원인이었다. 4. 식재식물의 생장상태는 불량하였는데 이는 投光量 부족으로 판단되어 棲息地造成時에는 錄陰期 投光量에 대한 사전 검토가 중요한 요인으로 나타났다. 5. 개화율은 섬초롱과 자란에서 높았으며 標高가 높을수록 개화기는 2∼4일 늦어지고 휴면기는 빨라지는 경향이었다. 식물 棲息地 造成時에는 造成 식물의 생장에 적합한 토양, 光環境 등을 고려한 위치 선정이 중요하며, 上層林에 의한 遮光으로 下層 초본식물 遷移速度가 빨라짐으로써 光環境 개선을 위한 上層林의 間伐, 周邊樹種의 更新이 요구된다. In order to make the artificial habitats of Lillium concolor, Campanula takesimana and Bletilla striata that the number of plant became sparse, 150 plants per species were transplanted at the region of 200m, 400m and 600m above sea level. And the growth of plants and the potential as habitats creation were analyzed. In the physical and chemical properties of soils in the there, soil pH was 5.2 to 5.6, organic matter content was 29 to 54g/㎏ and cation exchange capacity(CEC) was 9.4 to 11.5㎝ mol(+)/㎏. The transmittance rates of sunlight of the habitats during the growing periods were 10.8 to 11.6% in the 200m region, 10.8 to 11.4% in the 400m region and 11.0 to 12.8% in the 600m region. These transmittance rates were deficient for normal growth of plants. After the plants were transplanted, the survival rates of three species were high in common but the rates decreased gradually. Especially the decrease rate was high in the Bletilla striata. The causes of decrease were digging and cutting by climbers, sweeping asay by rainfall and freezing damage. Especially, the cold tolerance of Bletilla striata was weak in the natural condition. The growth of planted plants was poor, and it was assumed that the reason was shortage of sunlight transmittance. The flowering rates were high in the Campanula takesimana and Bletilla striata. And as the elevations were high, the flowering was later by 2 to 5 days but the dormancy was earlier. In the artificial making of plant habitats, the growth environment of plants have to be considered to choose the suitable region. And, because the habitats are shaded by the trees and bushes, the thinning of trees and the change of species are needs to improve the light transmission.

김치발효중 유기산 및 당함량변화

朴哲辰,曺哉銑 경희대학교 부설 식량자원개발연구소 1989 硏究論文集 Vol.10 No.-

In order to investigate the changes in sugar and organic acids of kimchi during fermentation, Chinese cabbage, radish and kimchi extracts were fermented by lactic acid bacteria and then analyzed acidity, pH, sugar and (acidic ac) of fermented samples. The major organic acids in the samples were lactic, acetic, malic and succinic acid Of these acids, lactic, acetic and citric acid were increased but malic and succinic acid were decreased during kimchi fermentation. The major sugars of the samples were fructose and glucose. The amount of sugars in these samples were decreased more rapidly when fermented at higher temperature than that of low temperature.

동진강 유역내 하천의 특성별 영향평가

윤순강,김원일,김진호,김선종,고문환,엄기철 한국환경농학회 2002 한국환경농학회지 Vol.21 No.4

본 연구는 동진강 유역의 수질 보전을 위한 기초자료를 얻기 위하여 동진강 본류와 이에 유입되는 정읍천을 대상으로 2001년 5월부터 11월까지 수질 모니터링을 실시하였다. 동진강 본류의 수질은 BOD기준으로 상수원 Ⅱ~Ⅳ등급(2.84~6.45 ㎎/L)으로 지점별로는 DJ6(정읍천 합류후)이 4.07㎎/L로 높게 나타나 Ⅲ급수의 수질을 유지하였다. COD는 지점별로 11.20~32.96 ㎎/L의 범위로 정읍천 합류후의 농도가 32.96 ㎎/L로 가장 높게 나타나 정읍천을 통한 본류의 오염물질량의 증가를 알 수 있었다. T-N의 경우 4.16~5.84 ㎎/L의 범위로 유역 전반에 걸쳐 오염이 이루어지고 있는 것으로 나타났고, T-P의 경우 BOD, COD와 마찬가지로 정읍천 합류후가 0.19 ㎎/L로 타 지점에 비하여 놀게 조사되었다. 본류의 COD의 경우 장마후 갈수기에 높은 농도를 나타냈고, T-P의 경우는 하천의 유량이 증가하는 홍수기보다 장마전 갈수기의 오염정도가 높고 이후 장마후 갈수기로 갈수록 수질이 악화되는 것으로 조사되었다. 동진강 수질의 오염은 주로 하류로 갈수록 그 정도가 심하게 나타나는데, 이것은 정읍천을 통해 유입되는 도시 생활하수와 인근 공장단지의 산업폐수가 그 주 요인으로 오염물질(BOD, COD T-N 및 T-P)의 농도가 상승하는 주원인이 되고 있다. 따라서, 동진강 수계의 수질관리를 위해 주 오염원이 되고 있는 정읍천의 도시생활하수와 공장단지에서 방류되는 산업폐수의 제어에 대한 대책이 먼저 이루어져야 할 것으로 판단된다. Irrigation water quality along Donjin river watershed was monitored to find a possible pollutants, for maintaining water quality to achieve food safety through water quality preservation of river. As a pollution indicators, such as Biological Oxygen Demand(BOD), Chemical Oxygen Demand(COD), Total Nitrogen(T-N), and Total Phosphate(T-P) in Dongjin river were examined from May to November in 2001. The results were as follows : The BOD level of Dongji n river ranged from 2.84 to 6.45 mg/L, which would be in a Ⅱ~Ⅳ grade of the potable water criteria by Ministry of Environment. Averaged BOD level of downstream DJ6(After Jeongupcheon confluence) was 4.07 mg/L. The average COD level of Dongjin river ranged from 11.20 to 32.96 mg/L. COD level of DJ6 rapidly increased rapidly after the junction of Dongjin river and Jungupcheon because it showed the latter had relatively high pollution level. T-N content were significantly high in all sites of Dongjin river ranged through 4.16 to 5.84 mg/L. T-P examined high concentration than another thing point by 0.19 mg/L after Jeongupcheon confluence as BOD and COD. COD of main stream was expressed high concentration to dry season after rainy season. In case of T-P, pollution degree of dry season before rainy season appeared and examined that quality of water was worsened go by dry season after rainy season. The water quality of Dongjin river was deteriorated with inflow of Jungupcheon polluted by municipal and industrial sites near Jungup city.

立地土壤의 特性

柳順昊,宋寬哲 濟州大學校 亞熱帶農業硏究所 1984 亞熱帶農業硏究 Vol.1 No.-

1975년에 完了된 濟州道 精密土壤調査 結果에 依하면 濟州道 土壤은 5 個 目, 10 個 亞目, 12개 大群, 30 個 亞群, 47 個 屬및 64 個 統으로 分類되며, 이는 便宜上 暗褐色土(17.01%), 濃暗褐色土(41.4%), 黑色土(21.6%), 및 褐色森林土(13.9%)의 4個 土壤群으로 大別된다. 濃暗褐色土, 黑色土 및 褐色森土는 代表的인 火山灰土이나 暗褐色土는 火山灰土的 特性을 弱하게 지니고 있다. 濟州道 火山灰土는 非晶質 珪酸鹽 粘土鑛物인 Allophane을 主粘土鑛物로 하고 있는데, 土壤 pH의 變化에 따라 Allophane에서 Al이 遊離되어 活性化되는 性質이 매우 强하며, 이러한 Allophane의 强한 礬土性에 基因되어 濟州道 土壤의 自然肥沃度가 낮다. 즉 難分解性의 有機物이 多量으로 集積되고, 그에 따라 假密度가 極히 낮으며 强風에 依해 土壤浸蝕이 쉽게 일어난다. 陽이온置換容量은 높으나 土壤의 鹽基吸着力이 弱하고 透水性이 過多하여 鹽基가 遊離, 溶脫되기 쉽다. 또한 燐酸을 吸着, 固定시키는 能力이 대단히 커서 有效燐酸이 缺乏되기 쉬운 問題 等이 있는데, 이러한 濟州道 火山灰土의 改良은 매우 어려운 것으로 알려져 있다. 特히 濟州道 土壤은 燐酸 固定 能力이 대단히 커서 有效燐酸이 缺乏되기 쉽기 때문에 作物 栽培에 있어서 燐酸肥料의 效果가 좋다는 것이 農民들에게 널리 알려져 Ca과 Mg 含量이 높은 熔成燐肥가 每年 多量으로 施用되어져 왔다. 따라서 濟州道에서의 肥料 施用 樣相을 調査한 結果 單位面積當 施肥量이 全國 平均에 比하여 濟州道에서 더 많을 뿐만 아니라 窒素肥料에 對한 燐酸과 加里肥料의 施用 比率도 濟州道에서 더 높은데, 이러한 傾向은 柑橘園이 많은 南濟州郡에서 더욱 현저하다. 1960年代 初부터 濟州道의 農耕地가 中山間地方으로 急激하게 增大되어가고 있으나 大部分의 農耕地는 海岸地方에 分布되어 있다. 따라서 山間地方 및 中山間地方의 土壤은 火山灰土의 一般的인 問題點을 갖고 있으나 耕作年代가 오래된 海岸地方 土壤일수록 pH, 鹽基飽和度, 有效燐酸, 置換性 Ca, Mg 및 K 含量이 높으며, 有機物 含量 및 陽이온置換容量은 낮아지는 傾向이다. 이러한 傾向은 集約的인 營農方法에 依해 經營되고 있는 柑橘園 土壤에서 더욱 현저하다. 柑橘園의 耕作年代가 오래될수록 土壤의 有效燐酸 含量 뿐만 아니라 置換性 Ca, Mg 및 K 含量이 增加하고 있으며, 陽이온置換容量은 柑橘園의 耕作年代에 따른 變化가 거의 없는데 反하여 置換性 鹽基 含量이 增加하므로 鹽基飽和度가 높아지고 따라서 pH가 높아지고 있다. 石灰나 燐酸 施用에 依해 含量 減少가 거의 없는 것으로 알려진 置換性 Al 및 活性 Al 含量은 柑橘園의 耕作年代가 오래될수록 현저하게 減少되고 있다. 置換性 Al 含量 減少는 主로 pH 增加에 基因되나 活性 Al 含量 減少는 主로 燐酸肥料의 多量 施用에 基因된다. 따라서 有效燐酸 含量이 極히 낮은 深土에서는 活性 Al이 有機物 含量 및 pH(NaF)와 高度로 有意한 상관관계가 있으나 表土에서는 상관이 낮다. Cheju Do is a volcanic Island. The valcanic eruptions began in the tertiary and the last eruptions were in 1002 and 1007 A.D. Volcanic ash is wide spread as soil parent material throughout the Island. Soils in the Island thus reveal typical characteristics of volcanic ash soil. The soils in Cheju Island are classified into 5 orders, 10 suborders, 12 great groups, 30 subgroups, 47 families and 64 series. For convenience, however, these soils are categorized mainly into 4 groups : dark brown soils(17.0%), very dark brown soils(41.4%), black soils(21.6%) and brown forest soils(13.9%), The last two groups have typical characteristics of volcanic ash soils, while the first is atypical. It is well known to farmers that soils in the Island have very high phosphate fixing capacity. Heavy application of phosphate and potassium fertilizer is a common practice. Therfore the amount of chemical fertilizers consumed per unit area of cultivated land and the ratios of ?? and K₂O to N in Chemical fertilizers applied are much higher in the Cheju Island than those of the Korean mainland. These trends are particularly prominant in Southern Cheju where 70% of the Cheju citrus orchards are located. The coastal area has long been used for intensive farming and some of the midmountain region were recently reclaimed for agricultural crop production. The cation exchange capacity and the organic matter in the soils increase in the order of coastal area mid-mountain belt upper mountain area, while pH, base saturation, available phosphorus and exchangeable bases decrease with the elevation. These trends are especially prominant in citrus orchard soils. As the result of heavy application of phosphate fertilizers, the available phosphorus of citrus orchard soils increase with increasing number of years of cultivation. Base saturation and pH increase with the increase in number of years of cultivation, inasmuch as exchangeable bases such as Ca, Mg and K increase prominantly, but the cation exchange capacity do not vary in the citrus orchard soils. The exchangeable Al of the citrus orchard soils decrease with increasing number of years of cultivation. This has resulted from an increase in pH. The content of the extractable Al of the citrus orchard soils also decrease with the increase in number of years of cultivation. This is related to the fact that application of phosphate fertilizers led to a reduction in Al activity. The extractable Al content strongly correlated with the organic matter and pH(NaF) in the sub-soil where the available phosphorus is extremely low, but the correlation is less significant in the top soil. This suggests the large amounts of the extractable Al are released from the hydrous oxides of Al and that the organically complexed form in the sub-soil, and non-extractable due to the reactions with phosphates applied to the top soil.

종횡비가 사각공간내의 혼합대류 열전달에 미치는 영향

이철재,정한식,김시범,권순석 동아대학교 공과대학 부설 한국자원개발연구소 1995 硏究報告 Vol.19 No.2

The effect of aspect ratio on mixed convection heat transfer in a rectangular enclosure has been studied numerically by the finite difference method. This study has been conducted to evaluate the effects of aspect ratio and position of outlet in the mixed convection for various Reynolds numbers at Pr=0.71 and Gr=10000. Independent of outlet position, as Reynolds number increases, the cell decreases at Re≤100 and then increases at Re〉100 in case R=10., but the cell only increases in case of R+0.5 and R=2.0.

2軸휨과 軸力을 받는 鐵筋콘크리트 正方形斷面柱에 關한 解析的硏究

장철인,정호철,김선자 서강정보대학 1999 산업과학연구 Vol.1 No.-

In this paper, Reinforced concrete square section column which is under bi-axial bending moment and axial force was studied, in an attempt to analyze the effect of axial force ratio changes on the stress and strain behavior of the concrete and reinforcing bar. Experimental data was utilized to divide the column into 169 concrete elements and 12 reinforcing bar elements. The relationship between the stress increment and the strain increment was derived from the equilibrium equation of force for each element. This was used to arrive at the equilibrium equation of axial force and bending moment, followed by the determination of curvature increment and bending moment increment. From the above results, a relationship between the axial force and the bending moment or deformation of the column was discovered. In addition, an equation was proposed which can deduce the bending moment and deformation of the square column by means of axial force ratios.

기관에서 발생한 전이성 갑상선 유두상 암종 1례

장선호,박철규,이병돈,장혁순,강주원 순천향의학연구소 1995 Journal of Soonchunhyang Medical Science Vol.1 No.2

Papillary adenocarcionma has been common malignant tumor of human thyroid gland, and metastasize to the lung and bone as well. But endotracheal meastasis of papillary adenocarcinoma is very unusual. A 75 years old woman was presented with a metastatic papillary thyroid adeno- carcinoma in the trachea, 10 years after total thyroidectomy. The tumor mass was located in the anterior wall of tracheal lumen. The mass was confirmed with pathologic finding. We describe a case of tracheal papillary adenocarinoma of thyroid gland origin and discuss the current recommendation for management.